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EP1017929B1 - Verfahren und vorrichtung zur regelung einer brennkraftmaschine - Google Patents

Verfahren und vorrichtung zur regelung einer brennkraftmaschine Download PDF

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Publication number
EP1017929B1
EP1017929B1 EP98945691A EP98945691A EP1017929B1 EP 1017929 B1 EP1017929 B1 EP 1017929B1 EP 98945691 A EP98945691 A EP 98945691A EP 98945691 A EP98945691 A EP 98945691A EP 1017929 B1 EP1017929 B1 EP 1017929B1
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EP
European Patent Office
Prior art keywords
engine
temperature
vehicle
controlling
fuel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98945691A
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English (en)
French (fr)
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EP1017929A1 (de
Inventor
Peter Novak
Sören ERIKSSON
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Volvo Car Corp
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Volvo Car Corp
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Publication of EP1017929A1 publication Critical patent/EP1017929A1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1446—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • F02D41/187—Circuit arrangements for generating control signals by measuring intake air flow using a hot wire flow sensor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a method for controlling a combustion engine, according to the preamble of the appended claim 1.
  • the invention is intended for use in connection with motor vehicles, for derivation of temperature values to be used in controlling the vehicle engine.
  • the invention also relates to a device for such a control of a combustion engine. according to the preamble of the appended claim 12.
  • the supply of air and fuel to the engine is normally controlled by means of a computer-based engine control unit.
  • This control unit is in a known manner arranged for detecting signals representing a number of different operating variables of the vehicle, e.g. engine speed, load, engine coolant temperature, vehicle speed, etc. From these signals, the amount of fuel to be supplied to the engine is continuously determined, and the supply is then made by means of an injection device.
  • This guideline value can however not be achieved for all points of operation, due to limitations regarding the maximum allowed thermal load on the components comprised in the engine and exhaust system. For example, the temperature of the engine cylinder head and exhaust system, and in any existing turbocharger unit, must be held within certain predetermined maximum limits. Should these limits be exceeded, there would be a risk of damaging the components.
  • this cooling effect is obtained by supplying a certain excess amount of fuel to the engine during the above-mentioned operating conditions, like for example when the vehicle driver applies full throttle during overtaking.
  • This will thus entail that the fuel mixture will be controlled so as to deviate from the stoichiometric mixture.
  • this increase in fuel supply is controlled to reach a certain level, corresponding to the exhaust gas temperature remaining lower than a predetermined limit value.
  • the magnitude of this limit value may be based on empirical criteria, which in turn would be determined by engine tests, and would be indicating a limit above which there is a risk of damage to certain sensitive components in the engine and exhaust system.
  • a major drawback with this known procedure relates to the fact that it is not always necessary to supply the excess fuel as quickly as the change in engine load, as the engine and exhaust system temperatures in any case do not increase as quickly as the load changes. This may in turn be attributed to thermal inertia in the various parts of the engine system. This often entails supplying an excess fuel amount to the engine at high loads and engine speeds, which is a drawback as it increases the vehicle fuel consumption.
  • a system for controlling the fuel supply to a combustion engine of a vehicle is previously known from the patent document US 5103791.
  • This system comprises means for detection of the engine load and the engine coolant temperature. Based on these values of load and temperature, a value of the temperature in the engine exhaust system is estimated. This temperature value is the basis for a correction of the amount of fuel fed to the engine. In this way, the exhaust system temperature can be limited, reducing the risk of damage.
  • a common feature of the two previously known systems is that they include relatively simple models for the engine system temperature, in particular providing a control that does not account for the thermal inertia of the respective temperature-sensitive component, e.g. during a sudden increase of the load.
  • the object of the present invention is to provide an improved method for controlling a combustion engine, in particular for a more optimized control of the thermal load acting upon the engine.
  • This object is achieved by a method, the characteristics of which are stated in the appended claim 1.
  • the object is also achieved by means of a device, the characteristics of which are stated in the appended claim 12.
  • the method according to the invention comprises detection of data representing predetermined variables of the operating condition of the engine and the vehicle, detection of a condition which corresponds to the fact that a particular thermal load upon the engine is present, determining at least one temperature value of the material of at least one component which is arranged in connection to or inside the engine, and controlling the thermal load of the engine dependent upon at least said temperature value,
  • the invention is characterized in that said control of the thermal load of the engine is carried out in the form of a gradually increasing supply of said surplus fuel dependent upon the thermal inertia inherent in said component in connection with changes in the rotational speed and/or load of the engine.
  • the engine can be cooled in an optimum way during e.g. sudden increases in load and speed. This in turn will secure that certain predetermined critical material temperature values are never exceeded.
  • This cooling i.e. the limitation of the thermal load on the engine system, may for example be achieved by utilising derived temperature values corresponding to temperature-critical components for control of the air/fuel mixture supplied to the engine, whereby an additional fuel amount is supplied as a function of the temperature values. In this manner particularly the enrichment of the air/fuel mixture can be delayed until its cooling effect is realty needed. This leads to a lower fuel consumption of the engine.
  • the derivation according to the invention is active within a certain "critical area” of engine operation, which is characterised by high loads and high speeds. Within this "critical area” there is a risk that some engine component might experience a temperature exceeding a critical value, thereby risking damage to said component.
  • This "critical area” is defined in this description as that area where the engine is normally controlled with an air/fuel mixture deviating from the stoichiometric relationship.
  • said cooling i.e. the limitation of the thermal load on the engine system
  • said cooling can be achieved by using the derived temperature values for controlling the air/fuel mixture supplied to the engine, whereby an additional fuel amount is supplied as a function of the derived temperature values.
  • an additional fuel amount is supplied as a function of the derived temperature values.
  • the thermal load on the engine system may be limited by injecting water or a corresponding coolant directly into one or more of the engine cylinders. This will provide environmental advantages and will also provide a quick cooling response in the engine cylinders.
  • thermal load on the engine system may be limited by control of a thermostat forming part of the engine cooling system.
  • the thermal load may be limited by controlling the charge pressure of the turbocharger. This may in turn be accomplished by regulating a wasiegaie valve in the turbocharger unit.
  • the invention provides an improved engine control compared to known systems, allowing the engine fuel consumption to be reduced, particularly for operating circumstances with high load and rotational speed. Notwithstanding this, the invention secures that no temperature-critical engine component will reach a temperature exceeding a critical limit value, at which damage might occur.
  • the invention is implemented as a complementing software function in an as such known engine control unit.
  • Existing vehicle components are in this way to a high degree used in combination with auxiliary software functions, without having to introduce any additional hardware components.
  • Fig. 1 shows, in principle, an arrangement in connection with a combustion engine where the present invention may be applied.
  • this arrangement is provided in a vehicle, in connection with the vehicle engine 1, which preferably consists of a conventional combustion engine.
  • the engine 1 is fed in the normal manner with inflowing air through an air duct 2.
  • the engine 1 is further provided with a cylinder head 3 and an engine block having a number of cylinders and a corresponding number of fuel injection devices 4, each connected to a central control unit 5.
  • the control unit 5, which is preferably computer based, is functioning in a known manner to control each injection device 4, respectively, so as to supply, at each moment, an appropriate air/fuel mixture to the engine 1.
  • the control unit 5 is functioning to control the air/fuel mixture to the engine 1 in such a manner that, at each moment, the fuel mixture will be adapted to the current operating conditions.
  • the amount of air to be supplied to the engine 1 is controlled by a throttle 6, and the supply of fuel is made as a function of several parameters representing the current operating conditions of the engine 1 and the corresponding vehicle.
  • the engine control may be dependent upon the current throttle setting, the engine speed, the amount of air injected into the engine, and the oxygen concentration of the exhaust gases.
  • the throttle 6 may be electrically controlled through a connection to the control unit 5, as indicated by a dashed line in the figure. In this case the throttle 6 is operated by an actuator motor (not shown), the position of which can be controlled by the control unit 5.
  • the engine 1 according to the embodiment is provided with the "multi-point" injection type, allowing the correct amount of fuel to the engine 1 to be supplied individually by means of the respective injection devices 4.
  • the invention may, in principle, also be utilised for so called “single-point" injection, where a single fuel injection device is located in the engine inlet manifold.
  • the engine 1 illustrated in the figure has four cylinders. It should however be understood that the invention could be used for engines having different numbers of cylinders and cylinder configurations.
  • the exhaust gases from the engine 1 are discharged through an exhaust outlet in the form of a manifold 7.
  • the engine 1 illustrated is of the type equipped with a turbocharger unit 8.
  • the invention is however not limited to this type of engine, but can also be used for engines without a turbocharger unit.
  • the exhaust gases are transported through the exhaust manifold 7 and on through an exhaust pipe 9 connected to the manifold and a turbine 10 belonging to the turbocharger unit 8. From the turbine 10, the exhaust gases are transported on through an additional exhaust pipe 11 to an exhaust gas catalytic converter 12, and then on out to the atmosphere.
  • the turbocharger unit 8 comprises a compressor 13, rotatably arranged on a shaft 14, on which also is arranged the turbine.
  • the compressor 13 functions to compress the air flowing in through an air inlet 15.
  • the incoming air is supplied to each cylinder through the air duct 2.
  • a lambda sensor 16 located upstream of the catalytic converter 12 for detection of the oxygen concentration in the exhaust gases, a rotational speed sensor 17 for the engine 1, a load sensor in the form of an air flow meter 18 (for measuring the amount of air injected into the engine 1) arranged in the air inlet 15, a temperature sensor 19 for detecting the engine 1 coolant temperature, a temperature sensor 20 for the air flowing into the engine, and a sensor 21 for the vehicle speed, are used. All sensors are connected to the control unit 5 via electrical connections.
  • the turbocharger unit 8 further comprises, in a known manner, a so-called wastegate valve 22, which is electrically controllable and can be continuously controlled between two positions.
  • the first position is a closed position, in which a bypass duct 23 in the turbocharger unit is blocked so as to conduct the exhaust gases from the manifold 7 through the turbine 10.
  • the other position is an open position, in which the passage through the bypass duct 23 is open. In the latter case, the exhaust gases will be bypassed directly to the exhaust pipe 11, without flowing through the turbine 10, which reduces the charge pressure from the turbocharger unit 8 during operation.
  • the wastegate valve it is connected to the control unit 5. In this way, the turbocharger pressure can be influenced through controlling the function of the wastegate valve 22.
  • the exhaust manifold 7, the turbocharger unit 8, the cylinder head 3 and the catalytic converter 12 may be mentioned. Consequently, there is a need for limiting the temperature of those thermally sensitive components arranged in connection with the engine 1.
  • a value of the temperature of at least one, from a temperature point of view critical, component is derived in the control unit 5.
  • This temperature value is used in controlling the engine 1, e.g. for a calculation of the amount of surplus fuel to be supplied to the respective cylinder 3.
  • the thermal load of the engine system may thus be controlled by the supply of surplus fuel in such a way that this temperature value will never exceed a predetermined limit value, corresponding to the presence of a risk of damage to the component in question.
  • the first value corresponds to the temperature of the material in the cylinder head 3.
  • the second value represents the temperature in the turbocharger unit 8.
  • the points in question are preferably selected as points in the respective components that from experience may be expected to be sensitive for high temperatures.
  • Fig. 2 is a flow chart that, in a somewhat simplified way, shows the function of the invention according to the first embodiment.
  • the engine control will follow a periodical course which is initiated by a number of data representing the vehicle operating conditions being detected by means of the sensors 16-21 (compare Fig. 1) and registered in the control unit 5 (square 25).
  • These data preferably comprise the engine speed, the engine load (e.g. the amount of air per combustion), the ignition angle, the engine coolant temperature, the temperature of the incoming air, and the vehicle speed.
  • base temperatures T 1 and T 2 are modelled, which represent indications of the temperatures of the selected temperature-critical material points (preferably consisting of the cylinder head and the turbocharger unit, respectively) (square 26).
  • a relationship between the base temperatures T1, T 2 and the engine speed and load may be predetermined for the engine type in question. This is done through temperature measurements made in advance at a number of different speeds and loads, whereby the relationships are stored in the form of a table in the control unit 5. All other data concerning the vehicle operating conditions (i.e. the incoming air temperature, the injection time, the ignition angle, the coolant temperature and the vehicle speed) are at this stage assumed to be equal to their nominal values, i.e. values corresponding to an operating condition of the engine system at normal, continuous operation.
  • the next step of the procedure comprises a static correction being made of the base temperatures T 1 , T 2 (square 27).
  • corrections ⁇ T 1, ⁇ T 2 are produced, dependent upon to what extent the recorded data for the engine injection time and ignition angle, coolant temperature, air temperature and vehicle speed are deviating from their respective normal values.
  • the two different temperatures, in the cylinder head 3 and the turbocharger unit are influenced to a different extent by changes in the above parameters.
  • These dependencies may also be produced by utilising tables stored in the control unit and defining a model for the temperatures of the cylinder head 3 and the turbocharger unit.
  • statically corrected temperature values T 1S , T 2S are then subjected to a dynamic correction (square 28). This is preferably made by means of a low-pass filtration of said temperature values, producing dynamically corrected, modelled values T 1M and T 2M . respectively.
  • a low-pass filtration of the first order is used for the dynamic correction.
  • T 1M is the output signal from the filter, corresponding to the final temperature estimation for the cylinder head 3
  • T 2M is the output signal from the filter, corresponding to the final temperature estimation for the turbocharger unit
  • ⁇ 1 and h 1 are the time constant and the sampling interval, respectively, for the cylinder head 3
  • ⁇ 2 and h 2 are the time constant and the sampling interval, respectively, for the turbocharger unit.
  • the time constants are selected as suitable functions of the engine speed and load.
  • the thermal inertia in association with the heating of the engine system can be utilised.
  • the term "thermal inertia” is used to describe the inherent dynamic temperature filtration, i. e. the relatively slow adaptation to a changed temperature existing between the exhaust gases and the material in the engine and the exhaust system. This thermal inertia is in turn due to the heat transfer between gas and wall material, the thermal capacity of the material, and the cooling effect of the surrounding media (e.g. air, water and material).
  • the modelled temperature values T 1M and T 2M thus represent the estimated temperatures of the cylinder head and the turbocharger unit, respectively, which have been compensated for the above-mentioned thermal inertia, and which will subsequently be used for controlling the surplus fuel supplied to the engine at full load.
  • T 1M , T 2M the modelled temperature values
  • T 1G , T 2G representing critical temperatures at which the cylinder head 3 and the turbocharger unit, respectively, run the risk of being damaged (square 29), in accordance with what has been discussed above.
  • the critical temperatures vary with the component in question, and also with the material used in that component.
  • corresponding values for a reduction of the amount of fuel injected into the engine are then determined (corresponding to the extent to which the injection time will be reduced in relation to the nominal case), which are to be used in controlling the engine injection device (square 30).
  • the smaller of the two reductions is selected for the continued engine control (square 31).
  • a value of a corrected absolute amount of injected fuel is obtained (square 32), which is used in engine control for regulation of the respective injection device (square 33). This will in turn create a limitation of the temperature within the system, as was explained above.
  • the corrected absolute amount of injected fuel will deviate to a certain degree from the nominal absolute amount.
  • the respective injection device is therefore controlled according to this corrected amount
  • the process then returns to square 25.
  • input signals from the various sensors will be detected anew.
  • the previously calculated value for the amount of injected fuel will be used as one variable in this detection (square 25).
  • a dashed line in Fig. 2 indicates this.
  • control of the added fuel amount in the "critical area" may be performed for the individual cylinder.
  • the engine must then comprise separate injection devices and ignition angle control for each cylinder. This is frequently available in today's vehicles.
  • Fig. 3 shows a diagram of the amount of surplus fuel supplied as a function of time.
  • the diagram shows an operating sequence that at a certain point in time, t 1 , includes a situation with a large increase in load, i.e. into that "critical area” which is characterised by so high loads and rotational speeds that the air/fuel mixture would normally be made richer than the stoichiometric mixture.
  • the amount of fuel supplied according to the invention i.e. the corrected absolute fuel amount
  • the fuel amount according to the known art i.e. the nominal absolute fuel amount
  • the modelling process according to the invention can be made adaptive. This might be necessary because one of the sensors 16-21 (see Fig. 1) is providing measurement values that drift over time and will provide differing measurement results, or because different engines will differ even if they are of the same model, making individual adaptation necessary. Furthermore, ageing of the engine and its associated components may require adaptive control. A detection of changes can be made by means of separate sensors or through empirical relations stored in tables in the control unit. Such possible changes may for example be detected by a temperature sensor (not shown) for measuring the exhaust gas temperature. As the measured temperature changes, the static calculation model will then be updated by being corrected. This adaptive calculation model (square 35) may then be included into the flow chart according to Fig. 2 by correcting on one hand the modelling of the base temperatures (square 26) and on the other the calculation model used for the static correction (square 27).
  • the values obtained for the injected amount of fuel can be utilised for controlling the engine 1 at high loads and speeds.
  • this control may be performed by regulating the amount of surplus fuel to the engine.
  • the control may also be performed by a regulation of the total amount of fuel and air supplied to the engine, in which case a lower engine power output entails a temperature decrease. This may in turn be controlled by means of the throttle 6, if the latter is an electrically controlled throttle.
  • the engine cooling can be achieved by regulation of the above-mentioned wastegate valve 22 (see Fig. 1), which for this purpose will be electrically controlled by means of the control unit 5.
  • the wastegate valve 22 can, according to this embodiment, be regulated, more specifically by changing it to a variable mode, in order to lower the charge pressure from the turbocharger unit. This entails that the temperature in the turbocharger unit 8 is reduced.
  • the wastegate valve may be controlled so as to obtain the required charge pressure.
  • one point associated with the engine combustion chamber and one point downstream of the engine are selected.
  • the vehicle cooling fan may be controlled for this purpose.
  • the temperatures of one or more of the thermally critical components could alternatively be determined with the aid of a hardware type temperature sensor that may be fitted in connection with the component in question. Consequently, also directly measured values could be used, instead of modelled values, in the control used according to the invention for cooling the engine.
  • ⁇ value obtained in the exhaust gases could be fed back and used as an input variable to the control unit.
  • existing systems for detection of erroneous ignition (so called "misfire") of the engine could be utilised for the modelling, as an incomplete ignition will also influence the exhaust gas temperature.
  • the invention can also be used for engines without turbocharger units.
  • the exhaust manifold would then be used as a temperature-critical component, the temperature of which you would wish to model.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Supercharger (AREA)

Claims (12)

  1. Verfahren zum Steuern einer Verbrennungsmaschine (1) beziehungsweise eines Verbrennungsmotors in einem Fahrzeug, mit folgenden Verfahrensschritten:
    Abtasten (25) von Daten, welche vorher festgelegte Variablen des Betriebszustands des Motors ( 1 ) und des Fahrzeugs darstellen,
    Bestimmen (26, 27, 28) mindestens eines Temperaturwerts (T1M; T2M) des Werkstoffs von mindestens einem temperaturkritischen Bauteil (3; 8), welches in Verbindung mit dem Motor (1) oder innerhalb des Motors (1) angeordnet ist, und
    Steuern (33, 40, 46) der thermischen Belastung des Motors (1) in Abhängigkeit von dem mindestens einen Temperaturwert (T1M; T2M) durch Hinzugeben von Kraftstoffüberschuss an den Motor (1),
    dadurch gekennzeichnet, dass
    der Verfahrensschritt Steuern (33, 40, 46) der thermischen Belastung des Motors (1) in Abhängigkeit von der spezifischen Wärmeträgheit des Bauteils (3; 8) in Verbindung mit Änderungen in der Umdrehungsgeschwindigkeit und/oder Belastung des Motors (1) in der Form einer stufenweise erfolgenden Erhöhung der Versorgung mit dem Kraftstoffüberschuss durchgeführt wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Verfahrensschritt Steuern einen Teilschritt Kühlen des Motors (1) aufweist, wobei das Kühlen in jedem Zeitpunkt minimiert wird, aber ohne dass der abgeleitete Temperaturwert (T1M; T2M) einen vorher für das Bauteil (3; 8) festgelegten Grenzwert überschreitet.
  3. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Menge des Kraftstoffüberschusses in einer solchen Weise gesteuert wird, dass ein im Wesentlichen stöchiometrisches Kraftstoff-/Luftgemisch dem Motor (1) zugeführt wird, und dass das Kraftstoff /Luftgemisch in Abhängigkeit von der Differenz zwischen dem Temperaturwert (T1M; T2M) und einem vorher festgelegten Grenzwert stufenweise angereichert wird.
  4. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass der Verfahrensschritt Steuern einen Teilschritt Kühlen mindestens eines Zylinders (3) des Motors (1) aufweist, wobei der Zylinder (3) mit einem Kühlmittel versorgt (40) wird, dessen Menge mindestens von dem Temperaturwert (T1M; T2M) abhängig ist.
  5. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass der Verfahrensschritt Steuern einen Teilschritt Steuern eines Thermostaten (43) aufweist, welcher zum Steuern des Kühlmittels zum Motor ( 1 ) ausgebildet ist.
  6. Verfahren nach Anspruch 2, wobei der Motor (1) eine Turboanordnung (8) aufweist, dadurch gekennzeichnet, dass der Verfahrensschritt Steuern einen Teilschritt Steuern eines Ladedruckbegrenzerventils (22) aufweist, welches Bestandteil der Turboanordnung (8) ist, wobei ein Ladedruck der Turboanordnung (8) in Abhängigkeit von dem Temperaturwert (T1M; T2M) erzeugt wird.
  7. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Verfahrensschritt Bestimmen des Temperaturwerts (T1M; T2M) einen Teilschritt in Abhängigkeit von der Wärmeträgheit dynamisches Modellieren der abgetasteten Daten aufweist, welche vorher festgelegte Variablen des Betriebszustands des Motors (1) und des Fahrzeugs darstellen.
  8. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Verfahrensschritt Abtasten (25) von Daten, welche vorher festgelegte Variablen des Betriebszustands des Motors (1) und des Fahrzeugs darstellen, einen Teilschritt Messen von Einspritzzeit und Zündwinkel des Motors (1), der Kühlmitteltemperatur des Motors (1), der Temperatur der Einlassluft in den Motor (1), der Motordrehzahl und des Luftförderstroms und der Fahrzeuggeschwindigkeit aufweist.
  9. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es folgenden Verfahrensschritt aufweist: Bestimmen (25, 26, 27) von zwei Temperaturwerten (T1M; T2M) von zwei Bauteilen (3, 8), welche in Verbindung mit dem Motor (1) angeordnet sind, wobei der Temperaturwert die größte Reduktion der thermischen Belastung des Motors (1) darstellt, die für den Verfahrensschritt Steuern verwendet wird.
  10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass die Temperaturwerte (T1M; T2M) die Temperaturen in dem jeweiligen Werkstoff eines Zylinderkopfes (3) des Motors (1) und einer mit dem Motor in Verbindung stehenden Turboladereinrichtung (8) darstellen.
  11. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es einen Verfahrensschritt Anpassen (35) aufweist, welcher Änderungen der abgetasteten Daten betrifft, die vorher festgelegte Variablen der Betriebszustände des Motors (1) und des Fahrzeugs darstellen, wobei die Ableitung in Abhängigkeit von diesen Änderungen durchgeführt wird.
  12. Steuervorrichtung für eine Verbrennungsmaschine (1) beziehungsweise für einen Verbrennungsmotors in einem Fahrzeug, mit mindestens einem Sensor (16 - 21) zum Abtasten von Daten, die mindestens eine vorher festgelegte Variable des Betriebszustands des Motors (1) und des Fahrzeugs darstellen, und mit einer Steuereinheit (5) zum Steuern eines dem Motor (1) in Abhängigkeit von diesen Daten zugeführten Kraftstoff-/Luftgemisches, wobei die Steuereinheit (5) zum Bestimmen mindestens eines Temperaturwertes (T1M; T2M) des Werkstoffs mindestens eines temperaturkritischen Bauteils (3; 8), welches in Verbindung mit dem Motor (1) oder innerhalb des Motors (1) angeordnet ist, und zum Steuern der thermischen Belastung des Motors (1) in Abhängigkeit von wenigstens dem Temperaturwert (T1M; T2M) ausgebildet ist, indem sie dem Motor ( 1 ) Kraftstoffüberschuss zusätzlich zuführt, dadurch gekennzeichnet, dass die Steuereinheit (5) zur Durchführung der Steuerung der thermischen Belastung des Motors (1) in Abhängigkeit von der spezifischen Wärmeträgheit des Bauteils (3; 8) in Verbindung mit Änderungen in der Umdrehungsgeschwindigkeit und/oder Belastung des Motors (1) in der Form einer stufenweise erfolgenden Erhöhung der Versorgung mit dem Kraftstoffüberschuss ausgebildet ist.
EP98945691A 1997-09-22 1998-09-16 Verfahren und vorrichtung zur regelung einer brennkraftmaschine Expired - Lifetime EP1017929B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9703394 1997-09-22
SE9703394A SE521897C2 (sv) 1997-09-22 1997-09-22 Förfarande och anordning för styrning av en förbränningsmotor
PCT/SE1998/001653 WO1999018342A1 (en) 1997-09-22 1998-09-16 Method and device for controlling a combustion engine

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EP1017929A1 EP1017929A1 (de) 2000-07-12
EP1017929B1 true EP1017929B1 (de) 2004-07-28

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US (1) US6397820B1 (de)
EP (1) EP1017929B1 (de)
JP (1) JP2001519501A (de)
AT (1) ATE272169T1 (de)
DE (1) DE69825300T2 (de)
SE (1) SE521897C2 (de)
WO (1) WO1999018342A1 (de)

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FR2907507B1 (fr) * 2006-10-20 2010-06-18 Peugeot Citroen Automobiles Sa Procede de pilotage d'un moteur thermique visant a reguler sa temperature.
US8788173B2 (en) * 2008-07-07 2014-07-22 Robert Horton Transou, JR. Fuel saver speed control
FR2942270B1 (fr) * 2009-02-13 2011-07-22 Peugeot Citroen Automobiles Sa Procede de determination de la temperature d'un piston
US8813692B2 (en) * 2011-05-19 2014-08-26 GM Global Technology Operations LLC System and method for determining coolant flow in an engine
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US9228482B2 (en) 2012-09-07 2016-01-05 GM Global Technology Operations LLC System and method for diagnosing a fault in a switchable water pump for an engine based on a change in crankshaft speed
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Also Published As

Publication number Publication date
SE9703394L (sv) 1999-03-23
SE521897C2 (sv) 2003-12-16
ATE272169T1 (de) 2004-08-15
EP1017929A1 (de) 2000-07-12
WO1999018342A1 (en) 1999-04-15
DE69825300D1 (de) 2004-09-02
SE9703394D0 (sv) 1997-09-22
US6397820B1 (en) 2002-06-04
DE69825300T2 (de) 2005-07-28
JP2001519501A (ja) 2001-10-23

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